STUDIES ON CHARACTERISTICS OF 10 SEMI-WILD TYPIES OF G.HIRSUTUM AND THEIR GENETIC RELATIONSHIPS

Yang Jiliang Cai Rongfang Deng Yusheng (Cotton Research Institute,CAAS,Anyang,Henan,China)

semi-wild typies(raccs) of G.hirsutum L.;;morphological characteristics;;Characteristics of pollengrain;;esteriase isozyme;;consanguinity systems

10 semi-wild typles (races) of G.hirsutum L.were comparied systematically from morphology,palynology,biochemistry aspects in this paper.The genetic relationships between these typies were studied by cluster analysis on the characteristics of blossom organ and pollen grain,and esterase lsozyme analysis.Each semi-wild type in morphological characteristics of flower organ macroscoplcally and pollen grain microscopically has its own specialities while similar with others.Thus these semi-wild typies can be easilly recognized and classified by characteristics of flower organ and pollen grain. Isoelectrofocusing eiectrophoresis finds that,semi-wild typies(races) were much similar with cultivar TM-1 of G.hirsutum in esterase isozyme bands,but each has its own marker bands.In bands of seed protein and peroxidase isozyme,There were no differences between semi-wild typies and cultivar TM-1 of G.hirsutum.Cluster analysis and esterases isozyme analysis demonstrated thst:(1)semi-wild typies(races) of G. hirsutum can be divided into 4 consanguinity systems,Richmondi and Yuctanense as a system,Morrllli and Palmeri as a system,Mexicanum,Punctatum,latifolium,(Hai-nan, Zhan-Jiang) Four-season cotton as a system,Marie-galante as a single system.(2)Hainan four-season cotton,Zhan-jiang four-season cotton,and Mexicanum can be thought as 3 G. hirsutum semi-wild races.(3)G.Palmeri as a semi-wild race of G.hirsutum.